You said, The Engine just shut off. And then you check'ed a few things .
I think, maybe ???? Just to be sure check under the coil packs there's a
plug in with, many wires held in place with a I think a 1/4 inch screw.
Disconect the plug in and, Sepreate the coil pack from the Print board.
Check the print board. Check it for cracks or brown spots.
It's free to check , And MAYBE the problem.